Redirect rule to remove/force www

redirect

<rewrite>
  <rules>
    <!-- Remove/force the WWW from the URL.
  
    You need to install the IIS URL Rewriting extension (Install via the Web Platform Installer)
    http://www.microsoft.com/web/downloads/platform.aspx
  
    ** Important Note
    using a non-www version of a webpage will set cookies for the whole domain making cookieless domains
    (eg. fast cdn-like access of static resources like css, js and images) impossible. -->
  
    <!-- Use this to remove www -->
    <rule name="Remove WWW" stopProcessing="true">
      <match url="^(.*)$" />
      <conditions>
        <add input="{HTTP_HOST}" pattern="^(www\.)(.*)$" />
      </conditions>
      <action type="Redirect" url="http://example.com{PATH_INFO}" redirectType="Permanent" />
    </rule>
    
    <!-- Or this to force www -->
    <rule name="Force WWW" stopProcessing="true">
      <match url=".*" />
      <conditions>
        <add input="{HTTP_HOST}" pattern="^example.com$" />
      </conditions>
      <action type="Redirect" url="http://www.example.com/{R:0}" redirectType="Permanent" />
    </rule>
  </rules>
</rewrite>